1. Introduction
The KINGBOLEN BM310 battery tester is a compact and efficient digital tool designed to quickly assess the condition and charge level of 12V vehicle batteries. It is suitable for a wide range of 12V batteries, including regular flooded, AGM flat plate, AGM spiral, and GEL types, commonly found in cars, motorcycles, golf carts, and family cars (excluding 24V batteries). Its simple operation and internal security chip ensure stable performance, high temperature resistance, and low temperature resistance, making it a reliable diagnostic tool for both home and commercial use.
2. Product Features
- Safe Operation: Designed for no leakage and no heat generation during use.
- Full Protection: Operates without interruption, featuring reverse polarity protection to prevent damage from incorrect connections.
- Quick & Accurate Results: Provides battery test results in just 3 seconds.
- In-Vehicle Testing: Can be used to test the battery directly in the car without removal.
- Battery Health Indication: Clearly displays the overall health condition of the battery.
- No External Charging Required: Utilizes low-frequency signal testing.
- Charging Voltage Check: Directly verifies if the car's charging voltage is normal.
- Starting Voltage Detection: Detects the starting voltage of the vehicle.
- Overload Status Detection: Identifies overload conditions of the car battery.
- 6 LED Indicators: Provides intuitive visual feedback on battery and alternator status.
3. Package Contents
Your KINGBOLEN BM310 package includes the following items:
- 1x BM310 Main Unit
- 1x Color Box
- 1x User Manual (this document)
- 1x Testing Clips (attached to the main unit)
4. Specifications
| Attribute | Specification |
|---|---|
| Brand | KINGBOLEN |
| Model | BM310 |
| Color | Gray |
| Test Method | Positive and negative test clips |
| Voltage Range | 4V-12V |
| Material | ABS industrial material |
| Product Size | 4.7 inch * 1.9 inch * 0.7 inch (120mm * 48mm * 17mm) |
| Display | Three-color LED light display |
| Weight | About 100g |
5. Setup
To set up your KINGBOLEN BM310 battery tester, follow these steps:
- Ensure the vehicle engine is off before connecting the device for battery state testing. For alternator state testing, the engine will need to be started.
- Connect the red testing clip to the positive (+) terminal of the 12V battery.
- Connect the black testing clip to the negative (-) terminal of the 12V battery.
- The device will power on automatically once connected.
For a visual guide on connecting the device, please watch the following video:
Video 1: BM310 Connection and Testing Demonstration
6. Operation
The BM310 uses a series of 6 LED lights to indicate the status of your battery and alternator. Green indicates good/full, orange indicates middle, and red indicates low or fault. The device provides an intuitive and clear assessment without requiring you to interpret exact voltage readings.
6.1. Alternator State Check
To check the alternator state, connect the device as described in the Setup section, then start the vehicle engine. Observe the LED indicators:
- Red LED (Fault): Indicates a charging system error. The alternator may be supplying no or very low voltage.
- Green LED (Good): Indicates the charging system is functioning correctly.
- Green LED (Full): Indicates a fully charged battery.
6.2. Battery State Check
To check the battery state, ensure the vehicle engine is off. Observe the LED indicators:
- Yellow LED (Middle): Indicates a moderately charged battery.
- Red LED (Low): Indicates a low charged battery.
- Green LED (OK): Indicates a good status battery.
6.3. Detailed LED Display Interpretations
The following table provides a detailed interpretation of the LED displays based on charging voltage:
| Display State | Charging Voltage | Testing Results |
|---|---|---|
| All LEDs off | None | Dead Battery |
| "ON" LED twinkling, other LEDs off | 4.6V - 11.2V | Engine hardly turns on. Turn off all electrical equipment and charge battery immediately. |
| "ON" LED ON, "LOW" LED twinkling | 11.2V - 11.6V | Low charged Battery, being charged immediately. |
| "LOW" LED on, "MIDDLE" LED twinkling | 11.6V - 12.2V | Middle charged Battery, better being charged sooner. |
| "MIDDLE" LED on | 12.2V | Middle charged Battery, better being charged. |
| "MIDDLE" LED on, "FULL" LED twinkling | 12.2V - 13.1V | Middle charged Battery, better being charged. |
| "FULL" LED on, "GOOD" LED twinkling | 13.1V - 14V | Good battery, Full Charged. |
| "GOOD" LED on | 14V | Good battery, Full Charged. No need to be charged. |
| "GOOD" LED on, "FAULT" LED twinkling | 14V - 16V | Battery may be damaged. Check the engine and tester. |
| "FAULT" LED on | Above 16V | Fault Battery. |
7. Maintenance
To ensure the longevity and accurate performance of your KINGBOLEN BM310, follow these maintenance guidelines:
- Cleaning: Wipe the device with a soft, dry cloth after each use. Avoid using abrasive cleaners or solvents.
- Storage: Store the tester in a cool, dry place away from direct sunlight and extreme temperatures.
- Inspect Clips: Regularly check the copper clips for any signs of damage, corrosion, or wear. Ensure they are clean and make good contact.
- Cable Care: Avoid bending or twisting the cables excessively to prevent internal wire damage.
8. Troubleshooting
If you encounter issues with your BM310, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No LEDs light up after connection | Poor connection or battery voltage too low (<4V). | Ensure clips are securely attached to clean battery terminals. Check battery voltage with a multimeter; if below 4V, the battery may be completely dead. |
| "Fault" LED lights up during alternator test | Alternator issue (supplying too low or too high voltage) or battery damage. | Refer to the 'Detailed LED Display Interpretations' section. If voltage is outside 14-16V range, consult a professional mechanic. |
| "Low" LED lights up during battery test | Battery is undercharged. | Charge the battery immediately. |
| Inconsistent readings | Loose connections or dirty battery terminals. | Clean battery terminals and ensure a firm connection with the clips. |
9. User Tips
- Always ensure the battery terminals are clean and free of corrosion for the most accurate readings.
- For battery state testing, it's best to test after the vehicle has been off for a while to get a stable resting voltage.
- When testing the alternator, ensure all non-essential electrical accessories are turned off to avoid skewed readings.
- The compact size and ergonomic design make it easy to handle, even in tight engine compartments.
10. Warranty and Support
The KINGBOLEN BM310 battery tester comes with a manufacturer's warranty against defects in materials and workmanship. For specific warranty terms, duration, and to access technical support, please refer to the official KINGBOLEN website or contact your retailer. Keep your purchase receipt as proof of purchase for warranty claims.
